Well pumping rig



June 9, 1931. c, BAKER 1,809,102

WELL PUMPI NG RIG Filed Jan. 21, 193$) INVENTOR.

A TTORNEYS.

Patented June 9, 1931 UNITED STATES PATENT OFFICE V REUBEN C. BAKER, OF COALINGA, CALIFORNIA, ASSIGNOR, TO BAKER OIL TOOLS, INCL,

OF HUNTINGTON PARK, CALIFORNIA, A CORPORATION OIE CALIFORNIA WELL PUMPING RIG Application filed January 21, 1930. Serial No. 422,354.

' This invention relates to deep well pumpmg rigs.

In counterweighting pitmans to compensate for the well load, the counterweight is necessarily so heavy that itis extremely difiicult to handle to enable repairs, adjustments, etc. to be made. It is the principal object of the present invention to provide a well pumping rig wherein the counterweighted pitman may be easily engaged or disengaged from the crank pin without the'use of auxiliary apparatus.

In carrying this invention into practice I provide a walking beam so connected to the samson post that'it may swing horizontally as well as vertically. The pitman is fitted with a jacking carriage so that its weight may be relieved from the crank pin and the beam and pitman easily moved relative thereto.

Oneform which the invention may assume is exemplified in the following description and illustrated by way of example in the accompanying drawings, in which: v

Fig. 1 is a side elevation of a pumping rig embodying my invention.

Fig. 2 is a plan view of same showing the pitman disconnected from the crank pin.

Fig. 3 is an end view of the rig.

Fig. 4 is a fragmentary view in side elevation of the pitman counterweight with the jack disengaged from the track.

Fig. 5 is an enlargedjragmentary-view in section showing the mounting of the jack in the counterweight.

Referring more particularly to the accompanying drawings, indicates a portion of a deep well pumping rig. This rig includes the usual oscillating Walking beam 11 which is supported at its center upon a samson post 12. The connection between the walking beam 11 and the samson post 12 is a universal one so that the walking beam may oscillate in a vertical or a horizontal plane. This connection per se fbrms the subject matter of my copending application entitled Walking beam swivel, filed January 21, 1980, Ser. No. 422,353.

One end of the walking beam is connected to the sucker rod of the well pump in the usual manner as illustrated. The other end of the walking beam is connected by means of a pitman 14 to a crank pin 15 arranged at an eccentric point on the band wheel 15a.

The pitman 16 is fitted with a stirrup 17 by means of which it is suspended from the walking beam.

The other end of the walking beam is fitted with a large counterweight 18 equipped with a crank pin bearing 19 which connects with the crank pin 15. The former is operative so that it may be quickly expanded to release the crank pin when desired. The novel arrangement and construction of the counterweight 18 and its bearing isfully described and claimed in my copending applications entitled Counterweight pitman, filed Jan. 21, 1930, Ser. No. 422,355, and Pitman bearing, filed Jan. 21, 1930, Ser. No. 422,352.

. Reference being had to Fig. 5 it will be seen that a screw shaft 20 is threaded upwardly into the lower end of the counterweight through a feed nut 21 rigidly secured to the counterweight 18. The lower end of the screw shaft 20 is fitted with a yoke 22 carrying a wheel or roller 23. This roller is adapted to engage a track 24 on the derrick floor oron the ground or base surrounding the rig. This track may bearcuate and concentric to the point of connection between the pitman and the samson post. However, the track may be of sufiicient width so that it need not be arcuate. In fact, under some circumstances the track may be eliminated and the roller bear directly on the base.

Under usual conditions the counterweight will weigh approximately four tons.

In operation, the rig is assembled as illustrated. When it is desired to disconnect the pitman, the screw shaft 20 is rotated until the roller at the end thereof engages the track or base. Continued rotation of the shaft will jack the counterweight up and relieve the weight from the crank pin 15. The pin bearing may then be expanded to release the crank pin.

When the walking beam has been disconnected from the pump rod, the entire walking beam and pitman may be swung horizontally to disengage the pitman from the crank pin.

It is obvious that during this time the weight will be sustained by the roller 23.

In this manner the counterweighted pitman may be handled with ease. Hitherto, it was diificult to suiiiciently counterweight pitmans because of the extreme difficulty in handling the same.

From the foregoing it is obvious that I have provided a rig enabling the pitman to be fully counterweighted for the well load and still be easily handled.

While I have shown the preferred form of my invention, it is to be understood that various changes may be made in its construction by those skilled in the art without departing from the spirit of the invention as defined in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. An apparatus of the character described pitman connecting the crank pin to the walking beam, jacking, means connected to the pitman whereby said pitman may be supported, said jacking means being supported on a roller to permit movement of the pitman laterally while so supported.

6. A pumping rig including a revoluble crank pin, a universally movable walking beam mounted thereabove, a counterweighted pitman connecting the crank pin to the walking beam, and a mobile jack operatively connected with the pitman whereby the pitman may be supported and moved laterally while so supported.

7. A pumping rig including a revoluble crank pin, a universally movable walking beam mounted thereabove, a counterweighted pitman connecting the crank pin to the walking beam, a mobile ack operatively connected with the pitman for supporting the weight of the pitman, and means for guiding including a walking beam, a revoluble crank, the movement of said jack.

a pitman connecting the walking beam and crank, and means connected with the pitman and capable of sustaining the weight of the same relieving the Weight thereof from the crank while the pitman is still connected with the crank.

2. A pumping rig including a horizontal ly disposed revoluble crank pin, a horizontally disposed walking beam mounted thereabove and extending at right angles to said crank, a vertically disposed counterweighted pitman connecting the crank pin to the walking beam, means for relieving the crank pin of the weight of the pitman while the pitman is still connected therewith, and a universal mounting for said walking beam enabling said pitman to be moved axially along the crank withoutdisconnecting the pitman from the walking beam when the crank is relieved of the weight of the pitman.

3. A pumping rig including a revoluble crank pin, a walking beam arranged thereabove, a counterweigltted pitman connecting the crank pin to the walking beam, and jacking means connected with the pitman and disposed beneath the same for elevating the pitman and relieving the crank pin of the weight thereof.'

4. A pumping rig including a revoluble crank pin, a walking beam mounted thereabove for universal movement, a counterweighted pitman connecting the crank pin to the walking beam, jacking means connected with the pitman and disposed beneath the same for relieving the crank pin of the weight of the pitman, said jacking means having a roller thereon enabling withdrawing said pitman from engagement with the crank pin while the jacking means is supporting the pitman.

5. A pumping rig including a revoluble crank pin, a universally movable walking beam mounted thereabove, a counterweighted REUBEN G. BAKER. 

